. "Involved in the synthesis of trypanothione in trypanosomatids." . "The enzyme from Escherichia coli is bifunctional and also catalyzes the EC 3.5.1.78 reaction, resulting in a net hydrolysis of ATP." . . . "Glutathionylspermidine synthase" . "Glutathione:spermidine ligase (ADP-forming)" . "GSP synthetase" . "Gamma-L-glutamyl-L-cysteinyl-glycine:spermidine ligase (ADP-forming)" . "Glutathionylspermidine synthetase" . "Glutathione + spermidine + ATP = glutathionylspermidine + ADP + phosphate." . "Magnesium" .